265436531 has 2 divisors, whose sum is σ = 265436532. Its totient is φ = 265436530.

The previous prime is 265436527. The next prime is 265436543. The reversal of 265436531 is 135634562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265436531 - 2² = 265436527 is a prime.

It is a super-2 number, since 2×265436531² = 140913103978627922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 265436491 and 265436500.

It is not a weakly prime, because it can be changed into another prime (265436551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132718265 + 132718266.

It is an arithmetic number, because the mean of its divisors is an integer number (132718266).

Almost surely, 2^265436531 is an apocalyptic number.

265436531 is a deficient number, since it is larger than the sum of its proper divisors (1).

265436531 is an equidigital number, since it uses as much as digits as its factorization.

265436531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 35.

The square root of 265436531 is about 16292.2230220434. The cubic root of 265436531 is about 642.6683281650.

The spelling of 265436531 in words is "two hundred sixty-five million, four hundred thirty-six thousand, five hundred thirty-one".